Evidence of shape variation in wild Tor Mahseer (Tor tor) from Indian Rivers

It has been hypothesized that geographical isolation between river ecosystems often resulted in phenotypic variation and ultimately change in the population structure of aquatic species. To test the hypothesis, 471 individuals of Tor Mahseer, Tor tor, were collected across its distribution range fro...

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Bibliographic Details
Published in:River research and applications 2021-12, Vol.37 (10), p.1424-1436
Main Author: Dwivedi, Arvind Kumar
Format: Article
Language:English
Subjects:
Aquatic ecosystems
Aquatic populations
Basins
Environmental management
Geographical isolation
Morphometry
Multivariate analysis
Phenotypic variation
Phenotypic variations
population
Population structure
Populations
River basins
River ecology
Rivers
Shape
Stocks
Tor Mahseer
Tor tor
Variance analysis
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Summary:It has been hypothesized that geographical isolation between river ecosystems often resulted in phenotypic variation and ultimately change in the population structure of aquatic species. To test the hypothesis, 471 individuals of Tor Mahseer, Tor tor, were collected across its distribution range from 18 locations on 10 Indian Rivers covering the Ganges, Narmada, and Godavari River basins to assess the population‐level inter‐ and intra‐basin shape variation through landmark‐based “geometric morphometrics.” Overall, multivariate analysis of variance (MANOVA) showed significant differences (F = 3.33, p 
ISSN:1535-1459
1535-1467
DOI:10.1002/rra.3866